Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1997-03-07
1998-09-08
Chevalier, Robert
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386113, 386114, H04N 591, H04N 5911
Patent
active
058057641
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a data transmitting apparatus which temporarily transfers audio data and/or video data (AV data) comprising audio data and video data stored in a library etc. to a predetermined recording apparatus and performs the transmission of that AV data using that transferred data.
BACKGROUND ART
In a broadcasting station, broadcast program data, for example commercials(CM) programs, etc. is usually stored in a library. The necessary broadcast program data is successively selected, reproduced, and transmitted from that library according to a broadcast schedule. This series of processing is controlled and managed by a control means called a library management system (LMS). U sing this LMS, a library having data on an enormous number of CM programs recorded in a very large number of recording media, for example, several thousand video cassette tapes, is managed and suitably used for broadcasting CM programs.
However, usually, in a broadcasting station, to prevent any interruption of the broadcast, the system is configured so that important apparatuses such as said library are duplicated, and even if one breaks down, operation by the other is possible. However, such duplex provisions require double the cost. In particular, duplication of large scale apparatus such as said library for CM programs has a great economic influence.
Further, in such a multiplexed library system, it is necessary to select one series of data for actual broadcasting from the plurality of broadcast program data output. Normally, this selection is performed by the switching operator viewing the monitor to check the quality of the video and audio at the main switcher, but this work places a heavy burden on the switching operator.
DISCLOSURE OF THE INVENTION
The present invention has as its object to provide such a data transmitting apparatus for transmitting broadcast program data such as for CM programs which can ensure the same extent of reliability as that by the duplex provisions of a library by a simpler configuration, in other words, a lower cost. Further, it has as its object the provision of an apparatus which can eliminate or reduce the checking of the AV data by the operator and thereby lighten the work load.
In recent years, AV data is also being digitalized and broadcast program data is being recorded as digital data in a library etc. in many cases. If the broadcast program data is digital data, techniques such as error detection codes (error correction codes) which are often used in data transmission etc. can be applied. Namely, by comparing the error detection codes produced with respect to AV data before and after the transfer, whether or not the AV data are equivalent can be checked. Further, it is possible the check the quality of the AV data by using the error rate and therefore upgrade the reliability.
Accordingly, a data transmitting apparatus of the present invention comprises a reproducing means for storing AV data comprised of at least one of video data and audio data and reproducing the stored AV data, a temporary recording means for temporarily recording the AV data reproduced by said reproducing means, a control means for controlling said reproducing means and said temporary recording means, a first error state detecting means for detecting an error state of the AV data reproduced by said reproducing means and outputting a first error detection signal, a second error state detecting means for detecting an error state of the AV data reproduced by said temporary recording means and outputting a second error detection signal, a transfer checking means for deciding that the transfer of the AV data from said reproducing means to said temporary recording means was suitably carried out when said first error detection signal and said second error detection signal are equal, and a data transmitting means for reproducing and transmitting the AV data suitably transferred to and recorded in said temporary recording means.
Preferably, when said transfer checking means decides tha
REFERENCES:
patent: 5414568 (1995-05-01), Taki et al.
patent: 5483389 (1996-01-01), Karasawa
patent: 5499147 (1996-03-01), Tsai et al.
patent: 5587807 (1996-12-01), Ootsuka et al.
Chevalier Robert
Frommer William S.
Sony Corporation
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